hey everybody im new to the forum and i have a wierd problem with my 2001 740i sport. after never having any problems with this car i started it one morning and my battery light was on. i wasnt at home so in the process of driving there i started losing electric components like the radio and the lights and so on. i figured it was the alternator and purchased a new liquid cooled alternator and replaced it. My battery light was still on so i replaced the battery and thought my problems were solved. no battery light on but then the car got warm and the battery light now go's on then off. if i shut off the car and let it cool down the alternator does fine until it warms up again. i unlocked the voltage on the dash and took it for a drive and the monitor shows around 13.5 volts until warm then the battery light comes on then the voltage goes down to around 11 volts and then it will go back off and the voltage will go back up to around 13.5 until the car is all the way warm then the battery light will stay on and wont charge the battery at all. if anyone has had this kind of problem and has any advice for me i would really appreciate any ideas or help. thank you.